NEW YORK (AP) - Fresh off their Grammy win - after which they appeared backstage Sunday smeared with red powder - Imagine Dragons will be the music guest tomorrow on "Saturday Night Live." Melissa McCarthy of "Mike and Molly" is the host.

NEW YORK (AP) - It won't just be the Denver Broncos, Seattle Seahawks and the fans getting ready to deal with the cold at the Super Bowl. Bruno Mars says when he was rehearsing outdoors for the gig at MetLife Stadium in New Jersey on Sunday, "the microphone turns into a Popsicle." So, Mars is trying to get "some heaters on everything." Mars is one of the youngest stars in recent years to be asked by the NFL to handle the Super Bowl halftime show. And he says he feels "like a new artist" compared to some of the acts who've done the halftime gig.

MIAMI (AP) - Pot - and an anti-anxiety drug. Authorities say that's what they found in Justin Bieber's system after he was busted last week in South Florida. A preliminary toxicology report says besides the weed and the Xanax, there were no other illicit drugs in The Beeb's system. Bieber was arrested last week on charges of DUI, resisting arrest and having an expired driver's license. Authorities say he was drag racing - but he wasn't charged with that. Bieber has pleaded not guilty - but did tell police he had been smoking pot and had taken a prescription drug.

LOS ANGELES (AP) - Jay Leno and his wife Mavis have been married 33 years and he swears they've never had a fight. Leno tells "Access Hollywood" that their secret is, "you have to like the person you're married to." He says they get along great, even though they're "complete opposites." Leno says he's "dyslexic and not too bright and she is extremely smart and reads five or six books a week."

TORONTO (AP) - The pie-making scene will be the one everyone's talking about after they see "Labor Day," just like the pottery-making scene was the highlight of "Ghost." Josh Brolin had to learn how to bake for real. He got off to a rocky start. He says he broiled instead of baked his first pie. Once he got the hang of it, he started bringing pies in for the crew. Brolin says when he stopped, the crew stopped talking to him. "Labor Day" opens today.

BURBANK, Calif. (AP) - Jay Leno got a surprise on the "Tonight" show last night. He was serenaded by Bill Maher and Seth MacFarlane. It was a take-off on the song Bette Midler did for Johnny Carson as he left as host of the show. Maher and MacFarlane did a parody of "Thanks for the Memory." It included the line, "I bet my socks, you'll turn up on Fox." The song also poked fun at the rivalry with David Letterman. The guys sang, "The beating that you gave. You crushed him in the ratings, and you'll carry it to your grave." Leno ends his 22-year-run on the Tonight show next week. NBC is replacing him with Jimmy Fallon.

TORONTO (AP) - Justin Bieber's legal problems have now spread to his home country. The teen singer was charged yesterday with assault. He's accused of hitting a Toronto limousine driver several times in the back of the head last month. The Beeb turned himself into a Toronto police station, arriving amid a crush of news reporters and screaming fans. Authorities say the singer was one of six people picked up by a limousine driver from a club early December 30. On the way to a hotel, there was an altercation - and the driver complains that he was hit several times in the back of the head. The driver says the person who did the hitting fled the limo before police arrived. Bieber is to return to court in Toronto on March 10.

MIAMI (AP) - Justin Bieber has Valentine's Day plans - but this is a legal date, not a romantic one. He's due in a Florida court February 14 to face charges of DUI, resisting arrest and driving with an expired license. The arraignment that day for the 19-year-old singer will see prosecutors formally file charges, and have the defendant enter a plea. It may be that The Beeb's lawyer can enter the plea in writing - and the singer may not have to attend the procedure. Bieber and R&B singer Khalil Amir Sharieff were arrested last week in Miami Beach during what police described as an illegal street drag race. Neither is charged with drag racing. But police say Bieber admitted smoking pot, drinking and taking a prescription drug.

LOS ANGELES (AP) - Brad Paisley says there's a reason people "get blasted when they cover Beatles songs" - the group has done some of the best music of all time and when someone else does it, they end up looking bad. And adding to the mix: covering those songs while the two surviving members of the group are right there watching you. That was the problem facing some of music's biggest stars Monday night as they performed a tribute to the group in Los Angeles. Paisley and Pharrell Williams joined on "Here Comes the Sun," while John Legend and Alicia Keys teamed up on "Let It Be," while Katy Perry did "Yesterday" - and her boyfriend John Mayer tag-teamed with Keith Urban on "Don't Let Me Down." At the end Paul McCartney and Ringo Starr took the stage and there was a huge sing-along of some of their biggest hits: "Hey Jude," "Sgt. Pepper" and "Yellow Submarine." Starr reminded the audience about the two Beatles who have died: John Lennon and George Harrison. Starr told the audience: "We were in a band. It's called The Beatles. And if we play, John and George are always with us. It's always John, Paul, George and Ringo." The telecast airs February 9 on CBS. The air date comes 50 years after the group made their first American TV appearance on "The Ed Sullivan Show."

NEW YORK (AP) - The saga of Dr. McDreamy and Dr. Grey will continue. Patrick Dempsey and Ellen Pompeo have signed contracts to be with "Grey's Anatomy" another two years. There had been speculation that other cast members would leave after Sandra Oh announced that she wouldn't be back for an eleventh season.